import { login, logout, getInfo } from '@/api/user';
import { getToken, setToken, removeToken } from '@/utils/auth';
import { resetRouter } from '@/router';

const getDefaultState = () => {
    return {
        token: getToken(),
        name: '',
        avatar: '',
        roles: [] //用于存储用户角色信息
    };
};

const state = getDefaultState();

const mutations = {
    RESET_STATE: (state) => {
        Object.assign(state, getDefaultState());
    },
    SET_TOKEN: (state, token) => {
        state.token = token;
    },
    SET_NAME: (state, name) => {
        state.name = name;
    },
    SET_AVATAR: (state, avatar) => {
        state.avatar = avatar;
    },
    SET_ROLES: (state, roles) => {
        state.roles = roles;
    }
};

const actions = {
    // user login
    login ({commit}, userInfo) {
        const {username, password} = userInfo;

        return new Promise((resolve, reject) => {
            login({username: username.trim(), password: password}).then(response => {
                const {data} = response;
                commit('SET_TOKEN', data.token);
                setToken(data.token);
                resolve();
            }).catch(error => {
                reject(error);
            });
        });
    },

    // get user info
    getInfo ({commit, state}) {
        return new Promise((resolve, reject) => {
            getInfo(state.token).then(response => {
                const {data} = response;

                if (!data) {
                    return reject('Verification failed, please Login again.');
                }

                const {name, avatar, roles} = data;

                if (!roles || roles.length <= 0) {
                    reject('getInfo: roles must be a non-null array!');
                }

                commit('SET_NAME', name);
                commit('SET_AVATAR', avatar);
                commit('SET_ROLES', roles);
                resolve(data);
            }).catch(error => {
                reject(error);
            });
        });
    },

    // user logout
    logout ({commit, state}) {
        return new Promise((resolve, reject) => {
            logout(state.token).then(() => {
                removeToken(); // must remove  token  first
                resetRouter();
                commit('RESET_STATE');
                resolve();
            }).catch(error => {
                reject(error);
            });
        });
    },

    // remove token
    resetToken ({commit}) {
        return new Promise(resolve => {
            removeToken(); // must remove  token  first
            commit('RESET_STATE');
            resolve();
        });
    }
};

export default {
    namespaced: true,
    state,
    mutations,
    actions
};

